<template>
    <div class="goodsinfo-container">
        <div class="transition" @before-enter="beforeEnter" @enter="enter" @after-enter="afterEnter">
            <div class="ball" v-show="ballFlag" ref="ball"></div>
        </div>
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper :lunbotuList="lunbotu" :isfull="false"></swiper>
                </div>
            </div>
        </div>
        <div class="mui-card">
            <div class="mui-card-header">{{ goodsinfo.title }}</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p class="price">市场价: <del>¥{{ goodsinfo.market_price }}</del>销售价: <span class="now_price">{{ goodsinfo.sell_price }}</span></p>
                    <p>购买数量:
                        <numbox @getcount="getSelectedCount" :max="goodsinfo.stock_quantity"></numbox>
                    </p>
                    <p>
                        <mt-button type="primary" size="small">立即购买</mt-button>
                        <mt-button type="danger" size="small" @click="addToShopCar">加入购物车</mt-button>
                    </p>
                </div>
            </div>
        </div>
        <div class="mui-card">
            <div class="mui-card-header">商品参数</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p>商品货号: {{ goodsinfo.goods_no }}</p>
                    <p>库存情况: {{ goodsinof.stock_quantity }}件</p>
                    <p>上架时间: {{ goodsinfo.add_time | dateFormat }}</p>
                </div>
            </div>
            <mui-card-footer>
                <mt-button type="primary" size="large" plain="" @click="goDesc(id)">图文介绍</mt-button>
                <mt-button type="danger" size="large" plain="" @click="goComment(id)">商品评论</mt-button>
            </mui-card-footer>
        </div>
    </div>
</template>

<script>
	//导入轮播图组件
	import swiper from "../subcomponents/swiper.vue";
	//导入数字选择框组件
	import numbox from "../subcomponents/goodsinfo_numbox.vue";

	export default {
		data(){
			return{
				id: this.$route.params.id,
				lunbotu: [],
				goodsinfo: {},
				ballFlag: false,
				selectedCount: 1
			};
		},
		created(){
			this.getLunbotu();
			this.getGoodsInfo();

		},
		methods:{
			getLunbotu(){
				this.$http.get("api/getthumimages/" + this.id).then(result => {
					if(result.body.status ===0){
						//先循环轮播图数组的每一项,为 item 添加img属性,因为轮播图组件中,只认识 item.img, 不认识 item.src
						result.body.message.forEach(item =>{
							item.img = item.src;
						});
						this.lunbotu = result.boyd.message;
					}
				});
			},
			getGoodsInfo(){
				//获取商品信息
				this.$http.get("api/goods/getinfo/" + this.id).then(result =>{
					if(result.boyd.status ===0){
						this.goodsinfo = result.boyd.message[0];
					}
				});
			},
			goDesc(id){
				//点击使用编程式导航跳转到图文介绍页面
				this.$router.push({ name:"goodsdesc", params:{id} });
			},
			goComment(id){
				//点击跳转到评论页面
				this.$router.push({ name:"goodscomment", params:{id} });
			},
			addToShopCar(){
				//添加到购物车
				this.ballFlag = !this.ballFlag;
			},
			beforeEnter(el){
				el.style.transform = "translate(0,0)";
			},
			enter(el,done){
				el.offsetWidth;
				const ballPosition = this.$refs.ball.getBoundingClientRect(),
				const badgePosition = document.getElementById("badge").getBoundingClientRect();
				const xDist = badgePosition.left - ballPosition.left;
				const yDist = badgePosition.top - ballPosition.top;
				el.style.transform = `translate(${xDist}px,${yDist}px)`;
				el.style.transition = "all 0.5s cubic-bezier(.4,-0.3,1,.68)";
				done();
			},
			afterEnter(el){
				this.ballFlage =!this.ballFlag;
			},
			getSelectedCount(count){
				//当子组件把选中的数量传递给父组件的时候 ,把选中的值保存到 data 上
				this.selectedCount = count;
				console.log("父组件拿到的数量值为: " + this.selectedCount);
			}
		},
		components: {
			swiper,
			numbox
		}
	};
</script>

<style lang="scss" scoped>
.goodsinfo-container {
  background-color: #eee;
  overflow: hidden;

  .now_price {
    color: red;
    font-size: 16px;
    font-weight: bold;
  }

  .mui-card-footer {
    display: block;
    button {
      margin: 15px 0;
    }
  }

  .ball {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background-color: red;
    position: absolute;
    z-index: 99;
    top: 390px;
    left: 146px;
  }
}

</style>